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MaRussiya [10]
3 years ago
12

Zack is designing wheels for aconcept car. The diameter of the wheel is18 inches. Zack wants to make spokes inthe wheel that run

from the center ofthe wheel to the rim. In other words,each spoke is a radius of the wheel. Howlong are these spokes?
Mathematics
2 answers:
Ket [755]3 years ago
4 0

Answer:

The spokes are 9 inches because the radius is half the diameter.

Comment if this is right.

Step-by-step explanation:

Genrish500 [490]3 years ago
4 0

Answer:

the answer is 9 inches

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A coffee packaging plant claims that the mean weight of coffee in its containers is at least 32 ounces. A random sample of 15 co
Luda [366]

Answer:

We conclude that the mean weight of coffee in its containers is at least 32 ounces which means that the data support the claim.

Step-by-step explanation:

We are given that a coffee packaging plant claims that the mean weight of coffee in its containers is at least 32 ounces.

A random sample of 15 containers were weighed and the mean weight was 31.8 ounces with a sample standard deviation of 0.48 ounces.

Let \mu = <u><em>mean weight of coffee in its containers.</em></u>

SO, Null Hypothesis, H_0 : \mu \geq 32 ounces     {means that the mean weight of coffee in its containers is at least 32 ounces}

Alternate Hypothesis, H_A : \mu < 32 ounces      {means that the mean weight of coffee in its containers is less than 32 ounces}

The test statistics that would be used here <u>One-sample t-test statistics</u> as we don't know about population standard deviation;

                             T.S. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample mean weight = 31.8 ounces

             s = sample standard deviation = 0.48 ounces

             n = sample of containers = 15

So, <u><em>the test statistics</em></u>  =  \frac{31.8 -32}{\frac{0.48}{\sqrt{15} } }  ~ t_1_4  

                                      =  -1.614

The value of t test statistics is -1.614.

<u>Now, at 0.01 significance level the t table gives critical value of -2.624 at 14 degree of freedom for left-tailed test.</u>

Since our test statistic is more than the critical value of t as -1.614 > -2.624, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u><em>we fail to reject our null hypothesis</em></u>.

Therefore, we conclude that the mean weight of coffee in its containers is at least 32 ounces which means that the data support the claim.

8 0
3 years ago
What is 1.20 rounded to the nearest tenth
alexandr1967 [171]

Answer:

1.20

Step-by-step explanation:

Because .2 is in the tenths place and 0 is the hundredths so you round the hundredths to the tenths and since its 0 then it stays the same.

5 0
3 years ago
Ben left town a at 22:25 and arrived at Stone b at 2:40 the next morning how long did is Journey take​
patriot [66]

Answer: The journey took 4 hours and 15 minutes.

5 0
2 years ago
What are the coordinates of the x-intercept of the equation 2x - 3y = 8?
ludmilkaskok [199]

Answer:

(4;0)

Step-by-step explanation:

y=0

2x-3×0=8

2x=8

x=4

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3 years ago
Divide to find equivalent fractions 40/100=10/10
Aleks04 [339]

Answer:

4/10=1

Step-by-step explanation:

Divide both fractions by 10 and you get 4/10=1

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